This project aims to build a machine learning based classifier to distinguish between various classical ciphers. Classical ciphers are historical encryption techniques that perform simple substitution ...

A substitution cipher is a cipher that maps each symbol in the plaintext to a symbol according to a permutation of the alphabet. A breakpoint is a location in the ciphertext where the cipher changes.

Abstract: Information security has become an intrinsic part of data communication. Cryptanalysis using deep learning-based methods to identify weaknesses in ciphers has not been thoroughly studied.

Abstract: A ciphertext mapping method based on Gray code is proposed to improve the security of quantum noise stream cipher (QNSC). The experiment is conducted in 1024 × 1024 -quadrature amplitude ...